aws-cdk documentation - elbv2

I'm currently experimenting with the new aws-cdk, and I am finding that the documentation is quite lacking in examples.

aws-cdk

Would it be possible to provide more examples, especially around:

To be slightly more accurate:
I'm trying to build a NLB+TargetGroup+ASG on an existing VPC, and struggling on many syntax gotchas.

NLB+TargetGroup+ASG

VPC

addUserData()

AutoScalingGroup

1 Answer
1

Here are some examples: For Java , These are what's inside the methods I created and does not include everything, also may not be best practice.

NetworkLoadBalancer networkLoadBalancer = new NetworkLoadBalancer(this, "NLB01", NetworkLoadBalancerProps.builder()
.withInternetFacing(false)

.withLoadBalancerName(new FnSub("$ProjectIDNLB").toString())
.withVpc(vpcNetworkRef)
.build());

AutoScalingGroupResource autoScalingGroupResource = new AutoScalingGroupResource(this, "AutoScalingGroup",
AutoScalingGroupResourceProps.builder()
.withAutoScalingGroupName(new FnSub("$ProjectID-ServerGroup"))
.withLaunchConfigurationName(launchConfigurationResource.getLaunchConfigurationName())
.withMinSize(minSizeParam.getValue().toString())
.withMaxSize(maxSizeParam.getValue().toString())
.withDesiredCapacity(desiredCapacityParam.getValue().toString())
.withTargetGroupArns(Collections.singletonList(targetGroupResource.getTargetGroupArn()))
.withVpcZoneIdentifier(subnets)
.withHealthCheckType("ELB")
.withHealthCheckGracePeriod(1020)
.build());

new LaunchConfigurationResource(this, "LaunchConfiguration",
LaunchConfigurationResourceProps.builder()
.withLaunchConfigurationName(new FnSub("$ProjectID-LaunchConfiguration"))
.withImageId(amiIDParam.getValue().toString())
.withKeyName(keyNameParam.getValue().toString())
.withSecurityGroups(securityGroupList)
.withInstanceType(instanceTypeParam.getValue().toString())
.withAssociatePublicIpAddress(false)
.build());
List<Object> defaultActionsList = new ArrayList<>();

defaultActionsList.add(ListenerResource.ActionProperty.builder()
.withTargetGroupArn(targetGroupResource.getRef().toString())
.withType("forward")
.build());

ListenerResource listenerResource = new ListenerResource(this, "Listener",
ListenerResourceProps.builder()
.withPort(80)
.withProtocol("TCP")
.withLoadBalancerArn(loadBalancerResource.getRef().toString())
.withDefaultActions(defaultActionsList)
.build());
listenerResource.addDependency( IDependable.builder()
.withDependencyElements(loadBalancerResource.getDependencyElements())
.build());

new TargetGroupResource(this, "TargetGroup",
TargetGroupResourceProps.builder()
.withHealthCheckIntervalSeconds(30) //FUTURE Parameter with limit as only [10,30] valid
.withHealthCheckProtocol("TCP")
.withHealthyThresholdCount(2)
.withPort(80)
.withProtocol("TCP")
.withUnhealthyThresholdCount(2)
.withVpcId(fnImportValueVpcId)
.withTargetGroupName("Target-Group")
.withTags(tagsTargetGroup.addTag("Owner", ownerParam.getValue().toString()))
.build());

TagList tagsNLB = new TagList();

LoadBalancerResource loadBalancerResource = new LoadBalancerResource(this, "NLB",
LoadBalancerResourceProps.builder()
.withLoadBalancerName("Network-Load-Balancer")
.withScheme("internal")
.withType("network")
.withTags(tagsNLB.addTag("Owner", ownerParam.getValue().toString()))
.withSubnets(subnets)
.build());

tagsNLB.addTag("Name", "NLB");

Output restAPIoutput =
new Output(this, "LoadBalancerArn", OutputProps.builder()
.withDescription("NLB")
.withExport(fnSubProjectID.toString())
.withValue(loadBalancerResource.getRef())
.build());


*Here is a function to create parameter *

private Parameter createParameter(String name, String type, String defaultTo, String description)
Parameter parameter =
new Parameter( this,name,
ParameterProps.builder()
.withType(type)
.withDefault(defaultTo)
.withDescription(description)
.build());
return parameter;



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